Gear polishing machine



June 27, 1933. T. J. MULLEN ET AL GEAR POLISHING MACHINE 4 Sheets-SheetFiled April 28, 1930 INVENTORS. TJ. MULLE/V, 9 w. c. POWELL.

L.' Q l A TTORN E X June 27, 1933. LLEN Er AL 7 1,915,749

GEAR POLISHING MACHjINE 4 Sheets-Sheet 3 Filed April '28, 1930 i -EL AI. w, MI I I' l TJMULLE 9 ATTORNEY Fetente June 27', 1%33 EHGMS r1M'ULLEN AND WILL G. PQWELIL, 01H DAYTON, QHIQ, ASSIGHQES IG QSCAR M.EGGCK, DOING BUSINESS AS THE CITY 6: roonwonns, F DAYTON,

' 1 v seen rorrsnrno mourns e puesomeree u e: es,

This invention relates to a machine for polishing geers or for likepurposes enol one objector? the invention is to proviso such o machinewhich will quickly and eficiently polish a. gear and which will not upone. large another polis ing member and for eolvencing the gears which areto be polished in timeol relation to the movement of the movablepolishing member.

A further object of the invention is to provide such e machine whichwill be simple in its operation, easily controllecl and which will be ofat strong (lureble cheracter.

ther objects of the invention will eppenr us the mechanism is describe@in oleteil.

ln the accompanying drawings l is a front elevation of eniechine-emboiying our invention; Fig. 2 is e. side e'levetion or thesome; Fig. 3 is s. top plen view of such o inechine; Fig. l is etrensverse sectionelwiew telren on the line 4: 1- of Fig. i; Fig. is evertical sectional view taken on the line 5-5 of Fig. 4:; Fig. 6 is asectionel detail view telren on the line 6-6 of Fig. tnF-ig. 7 is esectional. detail view taken on the line 7 -7 of Fig, 5; Fig. 8 is efront elevation of the controlling mechanism for reversing theolirection of rotation of the polishing members; Fig. 9 is o sectionaldetail View of the reversing mechanism; Fig. 10 is a plan view of thepolishing members showing it gear in position to be polished; and Fig.ll is a detail view of the conveyor actuating device.

lln these drawings We have illustretecl one embodiment of our inventionone hove shown the some as applied toe geerpolishing snow chine but itwill be understood that this embodiment hes been chosen for the purposesof illustrotion only and that the mechanism may take verious forms andmay be used for various purposes without departing from the 5 spirit ofthe invention.

As here illustrated the machine comprises a base or eolestel 10 on whichthe various ports of tie operating mechanism ere supported. in thismachine we utilize a plureality of operating members, preferably three,which are so arranged that when in their operative positions all of themwill engage cno not upon a single article. As here shown, the operatingmembers are in the form of toothezi polishing members adapted to engageend to interrnesh with the teeth of e geer which is to be polished; 011sof the polishing members, ll, is mounted for rotel p tron about itnormally fired ems enol the other 40 two olishin members 12 ere mountedfor p a 7 9 J7 bodily movement towerd and rrom the polishing member ll.While the polishing memhere 12 ere in their retrecteol positions e gear.2 M ispleced in such relation to the polishing member ll that when thepolishing members 12 ere moveu towerd the polishin member ll all threepolishing members will be caused to engege the gesr which is to bepolisheol.

The polishing members ere rotated. first in all one direction enol thenin the other direction to polish both sides of the teeth of the geer.

In the position of the ports shown in 4: one 5 the polishing members l2ore in on inner position close to the polishing mernher Ill, to set on uvery smell gear, while in Fig. 10 the polishing members 12 ere spec sofrom-the polishing member 11 s. oilstsnce sufiicient to receive end noton e lorger m ries the polishing member 11 is trunsversely aijusteble toeccommodete it to gears enrl polishing members of olifierent diameter.

As here shown, the housing 1 2 for the shaft ml lit) 13 is secured toand, if desired, may be formed integral with, a plate it which isslidably mounted at the lower side of the housing 15'. The plate 16 hasan upwardly extending lug 17 provided with an opening into which isthreaded a screw 18 which is rotatably mounted in the end wall of thehousing, held against axial movement with relation thereto and providedwith a hand wheel '19, whereby the plate and the shaft 13 may beadjusted. A locking screw 20 is threaded into the up er art of the lugl7 and extends upwar ly t rough a slot 21 in the top wall of the housingand through a plate or washer 22 resting upon the top wall or" thehousing and has mounted thereon, above the plate 22, a nut 23 by meansof which it may be rigidly secured in position to hold the plate 16 andhearing it against movement. lltotatably mounted in the housing 15 is adriving shaft 2d having driving connection with the shaft 13. ds hereshown, the shaft 24 is provided with a worm 25 which mesheswith a wowheel 23 on the upper end of the shaft 13. @ne end of the shaft 2projects beyond the end of the housing 15 and has mounted thereon a beltpulley 27 to receive a belt 28 by means'ot which it is connected to theshaft 29 of an electric motor 30.

The motor 30 is of the reversible ty e and is controlled by a reversingswitch, w ich is not shown but which is enclosed in a casing 31 andcomprises in part an actuating member or shaft 32 which projects beyondone side of thecasing. By manipulating the actuating member or shaft 32the switch may be initially closed to cause the motor to rotube in onedirection, then shifted to a position which will reverse the flow ofcurrent through the motor and cause the latter to rotate in the oppositedirection, and may then be moved to a neutral position which will openthe circuit and interrupt the operation of the motor. In the presentdevice, the initial operation of the switch actuating member, to placethe motor in operation, is effected manually and to this end anoperating handle 33 is connected with the actuating shaft 32. Thereversing and stopping movements of the switch are imparted theretoautomatically and the mechanism is so arranged that the polishing memberwill be given a predetermined number of rotations in one direction, thenreversed and given a predetermined number of rotations in the oppositedirection and then stopped, To accomplish this we have provided acontrolling mechanism which is driven from the mo tor. As here shown, atransverse shaft 35 is journaled in the bearing 33 carried by the sidewall of the housing 15 and has at its inner end a worm gear 3'? meshingwith a worm 33 on the driving shaft 24. The shaft 35 projects beyond theside of the housing 15 and rest res has mounted thereon a controllingmember or disk 39 which is so connected with the v shaft that it willnormally rotate therewith but the connection is preferably a frictionalone, as shown, so as to permit the shaft to have movement with relationto the disk, as will be hereinafter explained. Arranged axially of thecontrolling member 39 and projecting beyond the outer face thereof is astud 40 which is rotatable with relation both to the shaft and to thecontrolling member or dish. As here shown, the stud has a part 41extending into a recess in the end of the Elli shalt and is held againstaxial movement by contact with a boss 42 in the closure plate for thehousin 4:3 which encloses this part of the mechanism. llheshaft 35 hasdriving connection with the. controlling member or dislr 39 but thisconnection is preferably in the nature of a sh connection to permit theshaft to rotate with'relation to the disk under conditions which willhereinafter appear. For this purpose the shaft 35 is pro vided at itsend with a disk-like enlargement or'plate lll which is rigidly securedthereto and may, if desired, he formed integral therewith. This plate Mdis connected with the dish? by means oil a ring or collar 145 having aninwardly extending flange M6 which overlaps the rear face of the plateltd on theshatt. A ring oi fiber or other triction material M7, isinterposed between the bangs M6 and the plate lt land a disk of tithering toward the disk and thus establish a firm frictional connectionbetween the shaft and the disk. Mounted on the stud ill and extendingradially therefrom is an arm M which is preferably slidably mounted in atransverse opening in the stud. Pivotally connected to the outer end ofthe arm 44 is a link t5 the other end of which is rigidly secured to theswitch actuating shaft 32. The

controlling member or disk 39 is provided with suitable parts arrangedto engage the opposite sides ot the arm M and actuate the same, theseparts being preferably adjustable with'relation to the dish to properlytime the operation or the arm. As here shown, these parts are in theform of studs 43 and t? ed justahly mounted in an annular groove 523 inthe face of the dish.

1? Mill not ltd

When the actuating handle 33 is operated.

to close the circuit and plate the motor in operation the hnlr d5 willmove the arm id to the full line position shown in Fig. 8, the

arm 44: sliding in the stud 4:0 to compensateishing member has made thedesired numberof rotations the stud id on the disk 39 will engage theerni 44 end move the some to the dotted line position shown at Me inFig. 8 and this movement of the arm will cause the link so to set-no ethe reversing switch to polishing members are carried by blocks 51reverse flow of current through the motor thus csuse the motor shoft torotste in the opposite direction which, of course, causes the polishingmember and the dish 4% to rotate in reverse directions. When thepolishing member has made the desired number of rotations in s reversedirection the stud e? on the disk 39 will engage the arm 44 and move thesome to the position shown in dotted lines at 4% in Fig. 8 and thismovement of the arm will cause the link 45 to turn the switch actuatingshett 82 to its neutral position, thus interrupting the operation of themotor and of thepsrts connected therewith. Due to its momentum the motorwill have s certain smount oi movement after the switch has been movedto its open position Tout the frictional connection I between the sheit35 and the dish 39 will permit oil this further operation of the motorwithout ntlecting the positions of the several parts of the controllingdevice. The switch may take various forms and insy he provided with anysuitshle means, such as e coin, for so controlling the switch shaft 32that the switch may he moved from sterting position to reversingposition, it heing carried across the neutrel position hy momentum, andthen moved from reversing position to neutrnl position and stopped inneutral position, the slip connection permitting the continued movementof the motor loy momentum. Pressure applied to the handle 33 willforcethe switch'out of its neutral position to the starting position.

The two bodily movable polishing members 12 are carried by as supportingmember 49 which is slidshly mounted in suitehle guideways 50 on the mainframe of the structure and are freely 'rotstshle about their individualones. In the present device, the polishing members 12 are not. providedwith driving mechanism but are rotated by the gear which is beingpolished and which is rotated by the positively driven polishing member'11. In order to accommodate the polishing memhers 12 to gears ofdifierent diameters these slideloly mounted on the supporting member the49 and provided with means, such as screws 52, for rigidly seciiring thesame in adjusted positions. Preferabl the forward edges of thesupporting mom or converge inwardly. Any suitable means msy be providedfor imlpitting movement to the supporting memr to move the polishingmembers 12toward and from the polishing member 11. Prefthe other. A stud56 rnonnted on e fixed part of the apparatus extends downwardly throughan opening 57 in the supporting member or plate 49 end pivotellysupports on arm 58 which extends across the piston rod and is providedwith an enlarged portion 59 arranged between the stops and havingrounded edges tov engage those steps. lhe

free end of this erm is connected "by a link 60 with e. supportingmemher 4:9. in the present instance, the arm '58 is arranged below istonrod and 8. second short arm 61 is ri i ly connected with the sun 58 endis provi ed with an enlerged end srrsnged between the stops 55 on theupper side of the piston rod, The admission of air under pressure to thecylinder 53 is controlled by e. suitshle device errsnged edjecent to theoperetors station and this device preferably comprises n foot opernwollvalve. its here shown, on sir pipe 62 leads from. s suitehle scores ofsup-- ply for air under pressure, not shown, to e velve 63 which isnrrnnged in the lower part of the hose or pedestnl l0 and provided withn foot lever 64: by means of which may he opereted. A. conduit 65 leadsfrom the velve to the cylinder 53 end communicates therewith on theinnerside of the piston so thetwhen the vslvev isopereted to connect theconduits 8% end 65 the piston and the supporting member 49 will he movedoutwardly. When the pedel is released and the velve returns to itsnormal position the cylinder is connected with an exhaust pipe 66. Aconpad duitfi? -leedsto the cylinder 53 on the outer side-of the pistonand serves to admit air thereto {or the purpose of moving the piston,

and the supporting member 49 inwardly. In the present arrangement, theconduits 52 and lie 67 are in constant communication with the outer endof the cylinder but the air is delivered to the cylinder under apressure substantially less than the pressure of the air deliveredon theinner side of the piston by the conduit 65 so that when the valve 63 isopened the high pressure eirflwill force the;

- iston outwardly a ainst the lower pressure in the outer end thecylinder, and when the valve 63 is closed and the conduit 65 connectedwith the exhaust the low pressure air will actuate the piston and impartinward or operative movement to the supporting member. As here shown,the conduit 67 is connected with the supply pipe 62 but has interposedtherein a pressure regulator 68 by means of which the air pressure maybe reduced to the desired extent.

ile the supporting member 49 is in its retracted position and thepolishing members 12 are spaced from the polishing member ii, the gearto be polished .is placed in position to he engaged by the threepolishing members. The gear may be placed in this position in anysuitable manner but we prefer to provide mechanical means for feedingthe gears to polishing position so that the device will act on a largenumber of gears in rapid succession. For. this purpose we have employeda conveyor for supporting the gears and movin the same into operativerelation 95 to the polishing members. This conveyor may take variousforms but is here shown as an endless belt 69 supported by pulleys 70and having a series of studs 72 mounted thereon and spaced apartlengthwise thereof. M) Tu the premnt arrangement these studs entendthrough the endless belt and project for some distance heyond bothsurfaces thereof. i The outer ends of the studs are provided withreduced portions or intles 73 to 35 enter the central openings in t eears and rotatably support the latter. in up r stretch of the conveyorbelt extends just filow the several polishing members and the studs 72are of such height that a gear mounted on one of these studs will besupported in proper operative relation to the pollshin members. Theconveyor may he advanced in any suitable manner but it is preferablyadvanced step by step in timed relation to the movements of thesupporting member 49 which carries the polishing members 12, themovements bein studs 72 with its supported gear will be moved intooperative relation to the polish- W ing members each time the sup orting'mem her 49 is retracted, so that wen the supporting member and olishingmembers are again moved to their orward positions there will he a car inposition to be engaged thereby. T e actuating mechanism here showncomprises an arm 7 d pivotally mount ed on avertical axis beneath thesupportin memher t9 and having at its tree end a paw ordog 75 which isprovided with a nose 75o to engage the studs on the inner side olt'thebelt and advance the helt when movement is imparted n A it acts on timeinto ment wi he studs andthe out nose lilo nor/sled so when lit lit

dill

the pressure on thjp so timed that one of the inm tes is moved to itsinitial position the nose of the pawl ride ,over the stud and will thenhe moved into operative engagement therewith. The actuating arm is hasan elongated hub, 77 which is mounted on a vertical. shalt l8 and thishub is provided with a circumferential recess arranged to provide ashoulder 79, which shoulder is intersected by a slot 80 in the huh, Thehuh is arranged in line with the piston rod 54: and this red extendsthrough the slot 80 in the hub and has on its inner end a head 81arranged to engagethe shoulder 79 and rotate the hub whenever the pistonrod is moved in an out ward direction, to retract the supporting member49. This movement of the head imparts operative movement to theoperating arm M and causes the conveyor to be advanced one step. Anysuitahle means may he provided for restorin the actuating arm to itsinitial position w ere it will engage the next succeeding stud on theconveyorhut this urpose. cum erential recess arranged to provide ashoulder 82 which is engaged loy the end of a plunger 83 mounted in anair cylinder 84 adapted to he connected with a suitable source of supplyfor air under pressure, not here shown so that when the next forwardmovement of the piston rod moves thehead 81 out of engagement with theshoulder 79 on e11 83 Will IOtdl/B the hub to restore it e acuating armto its initial position. 1? ierably the cylinder 84 is in constantconnection with its source of air supply and contains air under pressureat all timm butthe pressure is suficiently low to permit the rotation ofthe hub and ot the actuating a hy the piston rod 54 when the latter isretracted. A stop 85 is arranged in the path of the actuating armit toit ill we have 'providedlluid operated means for The huh 77 has a secondcirits movement by the plunger 83 and; in the present instance, the armhas mounted therein escrow 86 to engage the stop and which may be adjdto accuratel position the dog with relation to the stu on the conveyor.

It ill be apparent, therefore, that in the operation oi the machine,latter a series of gears have been mounted on the conveyor studs, theloot valve 63 is actuated-to mm air to the cylinder 53 and thus causethe polishing members 12 to move into their operative positions adjacentto the polishingmemher ll. The conveyor having n actuated when thesupporting memher it was last retracted'thero will he a gear in positionto be engaged by the several polishing members. The switch actuatingshaft is then manipulated to start the motnrc After the motor has thepolishing memhers in one disod and will to munher of rota or nersveotoward. end from the first mentioned operet= ing member end having moonsfor'irnperting operative movement to said ec'tneting erm when saidsupporting" member is moved from said operating member, and o fluidopereted device acting on sold sctnetin em to re- I store the some toitsv initiel position.

vice to odvenee conve or 6, In at machine of the clierecter described,an operating member mounted for rotetion about s norinelly fined oinis,moons for ostenting said operating member, s movehle supporting member,e second operating rnemher rotetebly mounted on sold. snpportinginsinher and movehle therewith tovverd from the first mentionedoperating member, a conveyor having moons for supporting or pin ralityof? articles to he opereted on end orrenged to move seid erticlessnocessively into operative reletion to seid operating inernlcers, epivoted ectnsting srrn having e to en gage end ectnete seid conveyor onhaving; huh provided with e shoulder, or fluid onereted device connectedwith seid inovoh e support to move the some tovvnrd end from the first:orientioned operating meniher end having moons for importing operetivemove ment to said sctueting errn when snid supporting member is movedfrom seid operating member, s timid operated device noting on seidactuating erm to restore the some to its initial position, the lestmentioned finidop ersted device being subjected to e constsnt pressureless then the opereting pressure the first mentioned 7 operoted device,

means tor controlling the operetion o'l first mentioned finid operateddevice,

7, "in machine of the oherocter described, an opereting member mountedfor rotntion shout To, nor-molly tired enis, supporting member mountedfor reciprocotory more torverd end from snid operntinp? her, otheropereting members carried o3 l rn'ovehle with snid supporting inernhen'es.

operated device tor ectneting seid snpportinn; member, toot operatedvslve to control theoperetion of said fluid operoted device,

ing mechenisrn to scheme i, and lid controllers etion of s drivingmocha;

opere memher ehont o normally nit-so ti g; nsenther, o 0 g ed I n secondoperetinp; h

' tently meons,1zneons for rotetahly supporting o gear in operativerelation to said opereting memhers, driving mechanism operetivelyconnected with the first mentioned opereting meniher, menuelly operetedmeans for initiating the operstion oil seid driving mechenisrn, moonscontrolled by the operation of seid driving mechenisrn to smtornetieellqreverse the direction of rotation of said opereting member and tosnhwqnently interrupt the operetion oi seid operating member.

9. lo a geer polishing niechine, s plnrolity ofrotetehle polishingmembers monnted snhstentielly in at common plane, moons tor rotetim. oneof said polishing members, moons or moving one of seid polishingmenihers trsnsverselp to its evils toward end from enother of saidpolishing members at conveyor heving moons for supporting e pinrealityof goers in spsced reletion end orronged to move said gears hetvveenseid polfishing members, end means for intermittently opereting saidconveyor in timed relotion to the movements of said transversely movehlepolishing member to move said goers successively into operetive reletionto said plurality or in spaced relotion end to move said gears betweensold polishing" members, end means to intermi conveyor tion to tietrensverse movements of 'soid pol ishing mernher to cease the sense tomove seid into operotive relation to soid polishing members, tosupportthe some during the polishing operetion end then Wll3l1llltlWfrom seid polishing mono nine otthe chereeter descrihed,

pla horn when errenged to revhi to op i or" on in rnernoer, driving 1one oil ope? w to c in'operetcve enertieie, coin levy driving" mechanismto reverse ti el intstion oi? soid driven operetinpg her the some tooperate onseid srti in. the'ooposite direct on,

i it M, in rnsransne oi tne esenhed,

operating niloers mountedthey oi till ltlll lltl supporfiog member end.movable therewith eovverd end from the first memionedl oper= ezingmember, en emfilless conveyor herring e plurality of studs specedspertlerngfshwiee thereof endl ee ch provided! with meens for supporting onerfcicle too be operated on said conveyor being errengezi to move saidereielles successively into end onto)? opereeive refleiuon' to sold;operofamg menrri'rers e olevioe adapted to emgege e, stand on weconveyor agoilefiee.

'ber soteficebly moumtefl on se-id supporting member end movebieoherewifsh toward and from the firsfr, mentioned operating member, 1

e conveyor having e phnmlity or" studs spaced spore lengehvvise thereofon each provided with moons foe supporting an article to be operator?on, said conveyor being arranged! to move staid erftiekes successivelyinto operetive refiefiion wifizh seioi operating members eeflzueting ermheaving e pert to engage o; stud on seioi conveyor end emanate seicieonveyor, on operefiing device, end. meens for eonneeting seidroperating (ieviee with seicl movable suppose emi Wifilh sew actuatingerm.

in testimony whereof, they eifix their sig= neisores heeeflvo.

THQMAS J. MULLER 'WIILLARD i3. PQW'ELL.

